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MINOR: server: implement srv_set_running()

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This function was taken from check_set_server_up(). It does not consider
health checks at all and only sets a server up provided it's not in
maintenance. The resulting state may be either RUNNING or STARTING
depending on the presence of a slowstart or not. The state change is
propagated to tracked servers.

For now the function is not used, but the goal is to split health
checks status from server status and to be able to change a server's
state regardless of health checks statuses.
This commit is contained in:
Willy Tarreau 2014-05-20 22:46:35 +02:00
parent e7d1ef16bf
commit dbd5e78f5b
2 changed files with 75 additions and 0 deletions
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10
include/proto/server.h
View File

@ -136,6 +136,16 @@ void srv_append_status(struct chunk *msg, struct server *s, const char *reason,
*/
void srv_set_stopped(struct server *s, const char *reason);
/* Marks server <s> up regardless of its checks' statuses and provided it isn't
* in maintenance. Notifies by all available means, recounts the remaining
* servers on the proxy and tries to grab requests from the proxy. It
* automatically recomputes the number of servers, but not the map. Maintenance
* servers are ignored. It reports <reason> if non-null as the reason for going
* up. Note that it makes use of the trash to build the log strings, so <reason>
* must not be placed there.
*/
void srv_set_running(struct server *s, const char *reason);
/* Puts server <s> into maintenance mode, and propagate that status down to all
* tracking servers. This does the same action as the CLI's "disable server x".
* A log is emitted for all servers that were not yet in maintenance mode.

65
src/server.c
View File

@ -268,6 +268,71 @@ void srv_set_stopped(struct server *s, const char *reason)
srv_set_stopped(srv, NULL);
}
/* Marks server <s> up regardless of its checks' statuses and provided it isn't
* in maintenance. Notifies by all available means, recounts the remaining
* servers on the proxy and tries to grab requests from the proxy. It
* automatically recomputes the number of servers, but not the map. Maintenance
* servers are ignored. It reports <reason> if non-null as the reason for going
* up. Note that it makes use of the trash to build the log strings, so <reason>
* must not be placed there.
*/
void srv_set_running(struct server *s, const char *reason)
{
struct server *srv;
int xferred;
if (s->admin & SRV_ADMF_MAINT)
return;
if (s->state == SRV_ST_STARTING || s->state == SRV_ST_RUNNING)
return;
if (s->proxy->srv_bck == 0 && s->proxy->srv_act == 0) {
if (s->proxy->last_change < now.tv_sec) // ignore negative times
s->proxy->down_time += now.tv_sec - s->proxy->last_change;
s->proxy->last_change = now.tv_sec;
}
if (s->state == SRV_ST_STOPPED && s->last_change < now.tv_sec) // ignore negative times
s->down_time += now.tv_sec - s->last_change;
s->last_change = now.tv_sec;
s->state = SRV_ST_STARTING;
if (s->slowstart > 0)
task_schedule(s->warmup, tick_add(now_ms, MS_TO_TICKS(MAX(1000, s->slowstart / 20))));
else
s->state = SRV_ST_RUNNING;
server_recalc_eweight(s);
/* If the server is set with "on-marked-up shutdown-backup-sessions",
* and it's not a backup server and its effective weight is > 0,
* then it can accept new connections, so we shut down all sessions
* on all backup servers.
*/
if ((s->onmarkedup & HANA_ONMARKEDUP_SHUTDOWNBACKUPSESSIONS) &&
!(s->flags & SRV_F_BACKUP) && s->eweight)
srv_shutdown_backup_sessions(s->proxy, SN_ERR_UP);
/* check if we can handle some connections queued at the proxy. We
* will take as many as we can handle.
*/
xferred = pendconn_grab_from_px(s);
chunk_printf(&trash,
"%sServer %s/%s is UP", s->flags & SRV_F_BACKUP ? "Backup " : "",
s->proxy->id, s->id);
srv_append_status(&trash, s, reason, xferred, 0);
Warning("%s.\n", trash.str);
send_log(s->proxy, LOG_NOTICE, "%s.\n", trash.str);
for (srv = s->trackers; srv; srv = srv->tracknext)
srv_set_running(srv, NULL);
}
/* Puts server <s> into maintenance mode, and propagate that status down to all
* tracking servers. This does the same action as the CLI's "disable server x".
* A log is emitted for all servers that were not yet in maintenance mode.